Auger-bit.



J. T. PARKER.

AGE BIT.

APPLIGATGN FEED Arma, 1912 1 ;1 1 1,318. Patented Sept. 22, 1914.

' Attorneys Inventor vTO ellwhomimag/[concern: l

Beitknownthat LJnMns TPARRS@ citizen of the' United. Statesg residing 'at Birininghannjin the :ounty'c'fv Jeferson and. 1 State I of `'Alabfama, y have invented new `and useful"y Auger-Binet A which the ollo'ljwing'= wpccatonv .y inventi on(` *relates to certain f The ressent improvements in `lexpansible auger. bits,f the.v

y n is the Object "ofL the A `pfset 'imitan te" provide an eXp'arisible` bit whichr issirn` ,ple',' ldurable, substantial," compact and in*v expensive in constiuction,"and` one which shall be iconvenient, serviceable and eiiicient 'iilu'seI y .i ith the foregoing;v and L otherobjects in fviewwhi`chfwilljappear as the description vproceeds,y the invention resides .in` the com` binationiand.arragement 'ofparts` and in the detail'syfo't ,construction hereinafter described and? claimed, being l, i understood .that changes infthe precise, embodiment of the Ainvention herein disclosed T c'ani beJnade within ,the s'copeoffwhatis claimed withet fidepertng l frein theyspirtffot the ini-1 ventioin The mennen-finsteren intimated in as,

preferred embodiment in the .accompany- `lngfdrawingsa wherein-4 Y bit embodying the lpresentinvention 'lign` 2 ijs'a.1s`ide elevation.thereof., 3 is fa'f l sectional'ide'tail taken on the` l1ne 3+`l3fof`f Fig. 2. Fig. 4 isa longitudinal sectional .4u

.view of the ubit; Fig; l5 isa perspective 'view of a lockinglever employed in carrying out the invention."

Referring specifically to the drawings, the numeral 6 designates the' shank of the bit,

vwhich is providedatfits outer or lowerend y 'with an enlargedsemi-cylindrical.head 7 "terminating V*at its outer end ma cutting head S `and a, screw tip'9, asusual.l `The "":fforegoing 4vparts are customary fin annexpansible bit;` and -need' no further descrip-f tion.. v H Y In carrying out theypresent invention, a transverse 'slideway is provided 1n the flat' face ofthe head/7 adjacentlthe cutting head 8, the slideway comprising l a transverse channel 10 and a Tvigroove` 11at the bottom are. prefer AliifiZO'i-ltY l, iiLCG- L. a i .L-g, Figure 1j is a front f elevation of an auger 15A' lo@ (lng level? 1 9fS COGAXGISVQWH Midi i Alitssnugly"between the sides 'of the groove 'l'jandjh'as an extension or lug `2O projecting Eifoifinfitsintermediate portioninto the deepi -ened""portion 14 of the groove, and a ful- 'eff elefante;wenn; ...transfiere are; nel10 being` undercut as -"designat'edl by the mineraria L, The 'head "7, lsjjals' provided `with a narrow longitudinal jgroolvej 13` ex# ignatedfby 'the numeral 14, and thel` `bottom UNITED QFFIGE 1 JAMES lrifo'ins/n4-is PARKER;- oraBIR-MINGHAM; ALABnilL/l.l` i

tending inwardly romthe"channelllofand l C into the shank 6 for a` sho-rtfdistance, the

` groeve 1 3 being madefdeeperlatffanf inter-l mediate portion within ,the head-"7, Vas desto'theffsurfa'celof the shankf-TThe sides of the grooves, are."straight?and par"allell` The k edges fof the' shank 6 formed by thefgroovef 13" are cut `away-as designated the nu` mer'al 15 in order to providefdepressions for the purpose hereinafter set forth. y, This groove 13 may be' readily provided by means .y of a milling machine, aswell as theslde-lV way which methods, are well known tothe f mechanic. The Aufsualcutter ltfisslidableV in the slide-` way, the cutter fitting in,y the. Ichannel 10 flush withthe; flat faceofthe headand `having afifetongue(17:engaging the Tfgroove 11 se' asftozpermitfthe cutter'to slide longi tudinallyfuiithin theslide'way, but tobe constrained agaiiist other movements. 'The i111 neri or ,upper edge of the cutter 16 isbeveled .and toothed as designated by the numeral- 4.18 and works under thefclut-away portion 4of the channell The jslidewa'yv andcutter inclinedV A slightly Yfrom' f thel n order'htoifacilitate the cutting"v "or outer end of the lever is beveled and Atoothed as designated by the numeral 22 in order to engage the beveled andl toothed edge 18 of the cutter. The upper end of the lever within the shank is oiiset and diverges outwardly so as to normally project slightly from the shank as designated by the numeral 23.

` In orderk to normallyforce the lever 19 into engagement with the cutter, a spring 24 is arranged between the inner end of the lever and the bottom of the groove 13, the

l Iivided in the inner ,end-of the extension' 2O"r fio e theusalne Willengagethe eutter. y

spring ai beingia the form ef aieaf Spring.

'oizlug is finish with the lever `der that the corner provided thief'oliter end of t'he lever engages 'the' inner is of very s impleand compa'eteonstrnction,

`senj,iicjylindrioal '.head, thehead having a having one end engaged-in 'a kerf 25- proandvlying against the lever with its free end engaging the curved portion of the bottoin l of the groove 15. The ker of the extension j ville- Onset portion 23 of the `lever Will Contact with vthe intermediate 'neby gaining' considerable tensiono For `oonven,iejnee in 'setting the cutter, a scale, ofgraduations 26are provided on the fha-r1; Q7 "on them-d 7.

whichfcoperate With thepointer or guide "Brom thefforegoi'ng, taken in connection with the, drawings it will be apparent that edge'bf theot'ter n' ordery to lookl the cnt teij adainsit transverse motion. By depress- 111greifideredl-S75 by the depressionsv 15, the`le- ,ver vmay be swillng out of engagement with e "cutter so that the Gutter maybe ad-f J1'IfSLPt'ed'CrnSverSely to 'the proper position.`

The "Cutter is thus capable of being set atv various positions for cutting various sized holesfand as soon as theA leveris released,

'It Fill be Observed," that the present bit is highly desirable," and carries out thev objects aimed e inea satisfaetory inan- 'Having thus deserlbed the invention, what' is Claimed as new LS1 y. l,

"1- Arranger. embodyme n shank henne n r nsv'erse channel in its flat aeeaiidalon Y vria"rrvvgroove extending'from the'f'ehannel I intothe shanlgthe sides of the groove being Jroper in ore." y 1b fWiththe ontter,;\the-'inner-end of thelever portonpothe leef;Springs4 l on l ,Y l

' .Spring having one Send "'ftfng' in l the ke'rf l with the; otherfendfengaging the cnrveclpor- ,Y l l tion of'the!groove,` enter IfacfeI of the eutter alongits inner end, j 2. A bit'inlfdingka 15` inner` end'oi` the llever 19,l which is A A I p I end; .and n1 Senne intrposed. 'between the, ih'end nindylnver nndfsentedan the lsnlgud-y bottom of the r groove being curved to the surfaceof the shank, a cutter slid'able in the channel,` a lever jeoextensiv'e with Vand 'trting'snuglyfbetween thegsides of the groove,"v zthe lever having an intermediate lug, a pivot pin passingthroughthehead and `said lng, f

the youter--end oftheflever being engageable being offsetoutvvadly,r the lug having an nnerkerf flush vvith thelever, and`v a 'leaf .j tefin'ngnl Lwith the! benin-nd; sew tip extending from' said cutter,.ftheregbelnga transverse O'uide groove in oneifaee offthe i perfedge, a'l'eyer floriimedfin the longitudnnl groove and having In toothed lwe lianinfa henfnnnn ne groovefor-ninnathe-nwe endfofehe n engagement with ftli being `depfr'essibler` into the-"longitndinal' lever freni 'slidbl nutten,

testimony that.` I .claim the' vforegoing as my can,Tinneinnemend :ny-Signe .tre'lnthepre'senceofftvvo Witness'esff l .l JAMES4 frioHMAS nemen;

gfoove to` disengage the .tooth'edfeild ,ofthe 

